Tree dimensional close packing from two dimensional hexagonal close packed layers

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Tree dimensional close packing from two dimensional hexagonal close packed layers

Bikash kumbhar 28th Nov, 2019

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ADITYA KUMAR Student Expert 28th Nov, 2019

Hello there!

Greetings!

Three-dimensional close packing can be formed with the help of two-dimensional hexagonal packed layers in two ways: -

Stacking the second layer over the first layer:- let us suppose we take two hexagonal close packed layer A and place it over the second layer B such that spheres of the second layer are placed in the depressions of the first layer and tetrahedral void are formed when a sphere of the second layer is right above the void or simply the empty space of the first layer, we notice octahedral voids at the points where the triangular voids of the second layer are placed right triangular voids of the first one in such a way that triangular space doesn't overlap. Octahedral voids are bordered by six spheres.
Stacking the third layer over the second layer:- this can be done either by Covering Tetrahedral Voids or Covering Octahedral Voids.

Thankyou

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